Waterproof composition



UNITED STATES PATENT OFFICE.

SPENCER G. GRAVES, OF ST. LOUIS MISSOURI.

WATERPROOF COMPOSITION.

1N0 Drawing.

To all whom it may concern:

Be it known that I, SPENCER C. GRAVES, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented new and useful Improvements in Waterproof Compositions, of which the following is a specification.

This invention relates to a composition of matter for use as a liquid proof coating for fabric and other surfaces.

The object of the invention is to provide an improved liquid proof composition which is much less inflammable than nitro cellulose products, which is flexible and which penetrates the fabric or porous surfaces, nd which will not break or exfoliate.

The composition may be satisfactorily compounded by use of the ingredients named below, in about the proportions stated:

De-natured alcohol--- 2 ounces Pure benzol i ounce Acetone, U. S. P 5 drains Soluble cotton 1 drams Corn starch 3 drams The stated ingredients are thoroughly mixed and, if desired, appropriate oils may be added for specific purposes, but the addition of oils does not materially change the functioning of the composition. Mineral oilsserve best for fabrics, and vegetable oils for other purposes. The composition is of a paste like consistency which spreads well and may be readily applied and has more or less tendency-to contract.

The composition is perfectly flexible and Specification of Letters Patent.

Application filed February 21, 1921.

PatentedJune 21, 1921.

Serial No. 446,847.

penetrates fabric or porous surfaces to render them perfectly water proof, and also spreads over the surfaces to form a smooth surface coating. The starch gives the desired adhesive properties and by using the proper amount of starch the composition may be made to function as a glue.

The composition may be thinned by the portion of two ounces, benzol in the propor-.

tion of one-half ounce, acetone in the proportion of five drains, soluble cotton in the proportion of one and a half drams and starch in the proportion of three drains.

4. An improved water proof composition, comprising two ounces de-natured alcohol, one-half ounce pure benzol, five drains of acetone U. S. P., one and one-half drams of soluble cotton, and three drams corn starch.

SPENCER o. ea ivns. 

